GB/T 42630-2023 in English
VALIDMethods for chemical phase analysis of copper nickel sulfide ores—Determination of nickel and cobalt contents in six mineral phases
- Issued on:2023-05-23
- Implemented on:2023-12-01
- File Format:PDF
- Delivery:Via email within 5 business days
$330.00
《GB/T 42630-2023铜镍硫化物矿石化学物相分析方法 6 种矿物相中镍和钴含量的测定》由TC93（全国自然资源与国土空间规划标准化技术委员会）归口，主管部门为自然资源部(国土)。
Introduction
Technical Background and Innovation of the Standard
Copper-nickel sulfide deposits account for 86% of the total nickel ore resources in my country, and 75% of cobalt production comes from such deposits. This standard establishes for the first time a complete method system for simultaneously determining the nickel and cobalt contents in six mineral phases (magnetic sulfide phase, magnetic non-sulfide phase, sulfate phase, non-magnetic sulfide phase, oxidation phase and soluble gangue phase, refractory gangue phase), and innovatively introduces magnetic mineral phase subdivision technology.
Comparison of core detection methods
| Detection method | Advantages | Detection limit range (w/10-2) | Applicable scenarios |
|---|---|---|---|
| ICP-OES | Simultaneous detection of multiple elements, high efficiency | Ni:0.0026~0.0469 Co:0.0003~0.0021 | Batch analysis of high-content samples |
| AAS | Low equipment cost, strong anti-interference | Ni:0.0033~0.0413 Co:0.0005~0.0031 | Routine testing in small and medium-sized laboratories |
Key operating points
Magnetic mineral separation case
When using bar magnets (H=1~200×103/4π A/m) for separation:
1. Control the oscillation frequency to 180±20 r/min
2. The saturated bromine water extraction time is strictly 2 hours
3. The separation error of the magnetic sulfide phase and the non-sulfide phase must be <5%
Precision control requirements
Calculation formula for repeatability limit (r) and reproducibility limit (R):
- Total nickel content: r=0.0258m0.8037, R=0.137m0.9057
- Total cobalt content: r=0.195m0.6465, R=2.82m0.4568
Total allowable deviation of components: nickel phase ≤10%, cobalt phase ≤15%
Patent Technology Statement
The standard involves separation method patents in clauses 7.4.2 to 7.4.7 (patent holder: Shaanxi Geological and Mineral Experimental Institute). Users should pay attention to technical authorization matters.
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